Year	Number of
1990	715.98
1991	764.83
1992	815.04
1993	847.54
1994	858.66
1995	823.06
1996	813.35
1997	797.97
1998	797.02
1999	821.84
2000	818
2001	833.56
2002	836.61
2003	853.32
2004	885.72
2005	940.71
2006	991.31
2007	976.06
2008	1007.02
2009	1006.16
2010	978.69
2011	970.15
2012	947.4
2013	914.56
2014	926.4
2015	953.44
2016	939.86